(early draft) Strict mode - throw exception on assignment to read only property.

src/ic.h

Index: src/ic.h
diff --git a/src/ic.h b/src/ic.h
index 96838c7338a20878279172f24b9fef58486e7287..4b75746f735fbe144e9965323b6c952c005162f7 100644
--- a/src/ic.h
+++ b/src/ic.h
@@ -398,16 +398,10 @@ class KeyedLoadIC: public IC {
 
 class StoreIC: public IC {
  public:
-
-  enum StoreICStrictMode {
-    kStoreICNonStrict = kNonStrictMode,
-    kStoreICStrict = kStrictMode
-  };
-
   StoreIC() : IC(NO_EXTRA_FRAME) { ASSERT(target()->is_store_stub()); }
 
   MUST_USE_RESULT MaybeObject* Store(State state,
-                                     Code::ExtraICState extra_ic_state,
+                                     StrictModeFlag strict_mode,
                                      Handle<Object> object,
                                      Handle<String> name,
                                      Handle<Object> value);
@@ -416,10 +410,10 @@ class StoreIC: public IC {
   static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); }
   static void GenerateMiss(MacroAssembler* masm);
   static void GenerateMegamorphic(MacroAssembler* masm,
-                                  Code::ExtraICState extra_ic_state);
+                                  StrictModeFlag strict_mode);
   static void GenerateArrayLength(MacroAssembler* masm);
   static void GenerateNormal(MacroAssembler* masm);
-  static void GenerateGlobalProxy(MacroAssembler* masm);
+  static void GenerateGlobalProxy(MacroAssembler* masm, StrictModeFlag strict);
 
   // Clear the use of an inlined version.
   static void ClearInlinedVersion(Address address);
@@ -433,11 +427,16 @@ class StoreIC: public IC {
   // lookup result.
   void UpdateCaches(LookupResult* lookup,
                     State state,
-                    Code::ExtraICState extra_ic_state,
+                    StrictModeFlag strict_mode,
                     Handle<JSObject> receiver,
                     Handle<String> name,
                     Handle<Object> value);
 
+  void set_target(Code* code) {
+    ASSERT(code->extra_ic_state() == target()->extra_ic_state());
+    IC::set_target(code);
+  }
+
   // Stub accessors.
   static Code* megamorphic_stub() {
     return Builtins::builtin(Builtins::StoreIC_Megamorphic);
@@ -473,6 +472,7 @@ class KeyedStoreIC: public IC {
   KeyedStoreIC() : IC(NO_EXTRA_FRAME) { }
 
   MUST_USE_RESULT MaybeObject* Store(State state,
+                                     StrictModeFlag strict_mode,
                                      Handle<Object> object,
                                      Handle<Object> name,
                                      Handle<Object> value);
@@ -480,8 +480,9 @@ class KeyedStoreIC: public IC {
   // Code generators for stub routines.  Only called once at startup.
   static void GenerateInitialize(MacroAssembler* masm) { GenerateMiss(masm); }
   static void GenerateMiss(MacroAssembler* masm);
-  static void GenerateRuntimeSetProperty(MacroAssembler* masm);
-  static void GenerateGeneric(MacroAssembler* masm);
+  static void GenerateRuntimeSetProperty(MacroAssembler* masm,
+                                         StrictModeFlag strict_mode);
+  static void GenerateGeneric(MacroAssembler* masm, StrictModeFlag strict_mode);
 
   // Clear the inlined version so the IC is always hit.
   static void ClearInlinedVersion(Address address);
@@ -493,20 +494,35 @@ class KeyedStoreIC: public IC {
   // Update the inline cache.
   void UpdateCaches(LookupResult* lookup,
                     State state,
+                    StrictModeFlag strict_mode,
                     Handle<JSObject> receiver,
                     Handle<String> name,
                     Handle<Object> value);
 
+  void set_target(Code* code) {
+    ASSERT(code->extra_ic_state() == target()->extra_ic_state());
+    IC::set_target(code);
+  }
+
   // Stub accessors.
   static Code* initialize_stub() {
     return Builtins::builtin(Builtins::KeyedStoreIC_Initialize);
   }
+  static Code* initialize_stub_strict() {
+    return Builtins::builtin(Builtins::KeyedStoreIC_Initialize_Strict);
+  }
   static Code* megamorphic_stub() {
     return Builtins::builtin(Builtins::KeyedStoreIC_Generic);
   }
+  static Code* megamorphic_stub_strict() {
+    return Builtins::builtin(Builtins::KeyedStoreIC_Generic_Strict);
+  }
   static Code* generic_stub() {
     return Builtins::builtin(Builtins::KeyedStoreIC_Generic);
   }
+  static Code* generic_stub_strict() {
+    return Builtins::builtin(Builtins::KeyedStoreIC_Generic_Strict);
+  }
 
   static void Clear(Address address, Code* target);